New Urban Challenges Require Creative Solutions

Architect says that current problems facing our cities cannot be solved with outmoded thinking.

1 minute read

February 26, 2004, 10:00 AM PST

By Geoffrey Singer @GeoffreySinger


In an era of scarcity, we need to call upon visionaries to provide effective and low-cost responses to problems such as homelessness, poverty, ill health and environmental degradation, writes Sonja Persram. Martin Liefhebber, principal architect of Breathe Architects and an innovator in the practice of sustainable building design, believes that solutions to urban problems must respond to the needs of a changing population. Amongst his prescriptions: introduce mixed-use zoning to permit more people to work from home, change zoning laws to permit more housing units on each property and also along laneways, change building codes to recognize alternative technologies, and redesign residential streets and sewage systems to be more friendly to people and the environment.

Thanks to Geoffrey Singer

Tuesday, February 24, 2004 in The Toronto Star

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

September 30, 2026 - Zachary Whalen

The mayor of Baltimore speaks into a microphone in front of a rally for more state transportation funding from Maryland.

‘Going backwards:’ Baltimore mayor, students rally against state's transit funding plan

Maryland's proposed six-year plan provides no funding for Baltimore’s BMORE bus program and reduces its road maintenance funding.

October 2, 2026 - Baltimore Sun

An old brick apartment building in NYC.

Mamdani sent nearly 6,000 pied-à-terre tax warnings to homes that didn’t qualify

A judge has ordered the administration to cancel thousands of pied-à-terre tax notices after it sent 35% of them erroneously.

October 3, 2026 - The City Reporter

An old brick apartment building in NYC.

Mamdani sent nearly 6,000 pied-à-terre tax warnings to homes that didn’t qualify

A judge has ordered the administration to cancel thousands of pied-à-terre tax notices after it sent 35% of them erroneously.

October 3 - The City Reporter

A rendering of the waterfront development, which shows a lit-up stage by the waterfront and people walking about.

Detroit to transform waterfront with $2.2 billion investment

Developers will convert about 18 acres of unused parking lot space into civic spaces.

October 2 - ABC 7

The mayor of Baltimore speaks into a microphone in front of a rally for more state transportation funding from Maryland.

‘Going backwards:’ Baltimore mayor, students rally against state's transit funding plan

Maryland's proposed six-year plan provides no funding for Baltimore’s BMORE bus program and reduces its road maintenance funding.

October 2 - Baltimore Sun

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.

Senior Planner

City of Thousand Oaks

Community Development Director

City of Wisconsin Rapids

Professor of Urban Planning

Harvard University Graduate School of Design